I just took a look at Arizona. This map from greatwesterntrail.org shows various trail paths. I took that map image and overlaid it on Google Earth along with the GPS track files from both Jerry and wbb. In some places the tracks from Jerry and wbb are exactly on the map path, and other places they divert from the map path, sometimes by a large distance.

If you like the maps from greatwesterntrail.org, it's pretty easy to use the Google Earth image overlay tool and the semi-transparent feature to show them in Google Earth. Once you have them in there, lined up correctly, it's also pretty easy to draw a GE path following the lines on the maps, then convert the GE paths into a GPS file. The whole thing could be done in one day.

Scott, This sounds like something only a rocket scientist could do. Can you create a file with just the basic (low resolution) GWT.org path and the Benchmark map path?
Like I said, I have is Big Dog's very crude Saved tracks, and someone elses hand drawn tracks.